A one inch (25mm) badge is roughly the same size as a UK 2p coin or a US quarter, as seen below:

Badges are often called button pins, pins, button badges, pinback buttons: It depends where you are in the world!

Description:

This is a brand new 1inch/25mm diameter badge/button/pin with a rear pin fastening.The front of the badge has the text I forgot my gym kit, sir in white on a red background.This funny joke novelty badge is a great gift idea for a school teacher, pupil or student, or as an accessory for a school disco fancy dress costume.